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EP1926625A1 - Method for controlling a vehicle drive train comprising two cooling circuits - Google Patents

Method for controlling a vehicle drive train comprising two cooling circuits

Info

Publication number
EP1926625A1
EP1926625A1 EP06808295A EP06808295A EP1926625A1 EP 1926625 A1 EP1926625 A1 EP 1926625A1 EP 06808295 A EP06808295 A EP 06808295A EP 06808295 A EP06808295 A EP 06808295A EP 1926625 A1 EP1926625 A1 EP 1926625A1
Authority
EP
European Patent Office
Prior art keywords
communication
engine
vehicle
setting
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06808295A
Other languages
German (de)
French (fr)
Inventor
Cedric Rouaud
Robert Yu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SA
Original Assignee
Renault SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SA filed Critical Renault SA
Publication of EP1926625A1 publication Critical patent/EP1926625A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/02—Supplying electric power to auxiliary equipment of vehicles to electric heating circuits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/003—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • B60L50/15—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with additional electric power supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • B60L50/16—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with provision for separate direct mechanical propulsion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
    • B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/34—Cabin temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/425—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/44—Drive Train control parameters related to combustion engines
    • B60L2240/445—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/52—Drive Train control parameters related to converters
    • B60L2240/525—Temperature of converter or components thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2260/00—Operating Modes
    • B60L2260/20—Drive modes; Transition between modes
    • B60L2260/22—Standstill, e.g. zero speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P2005/105—Using two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2031/00—Fail safe
    • F01P2031/30—Cooling after the engine is stopped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2050/00—Applications
    • F01P2050/24—Hybrid vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/02—Intercooler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/04—Lubricant cooler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/04—Lubricant cooler
    • F01P2060/045—Lubricant cooler for transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/08—Cabin heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/16—Outlet manifold
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

Definitions

  • the invention relates to the control of powertrains of motor vehicles and in particular that of their cooling circuits.
  • hybrid vehicles are equipped with a power train comprising a heat engine, one or two electrical machines, electronic power components and a power battery.
  • the heat engine can be used to recharge the batteries via a generator and / or to tow or propel the vehicle. In the case where the engine only recharges the vehicle's batteries, it is called a hybrid series vehicle. In the case where the heat engine tows and / or propels the vehicle, it is called parallel hybrid vehicle.
  • the temperature level of the coolant electrotechnical organs (the one or more electrical machines and electronic power components) and the temperature level of the coolant of the engine are not the same.
  • the temperature of the coolant in order to improve the reliability of the electrotechnical components (in particular the power electronics), the temperature of the coolant must not exceed a threshold such as 70 ° C.
  • the coolant of the engine in order to improve the reliability of the electrotechnical components (in particular the power electronics), the temperature of the coolant must not exceed a threshold such as 70 ° C.
  • the coolant of the engine must not exceed a threshold such as 100 ° C. Therefore, it is interesting to use two cooling circuits in order to comply with the thermal specifications of the components of the hybrid powertrain, namely a low temperature circuit for the electrotechnical organs and a high temperature circuit for the engine.
  • Document JP-2004 07 66 03 discloses a vehicle in which the two cooling circuits associated respectively with the heat engine and the electric motor can be placed in fluid communication in the event of failure of the pump of one of the circuits.
  • the setting in communication is limited to this abnormal circumstance.
  • An object of the invention is to improve the operation of the powertrains, particularly but not exclusively in the case of hybrid vehicles to improve the cooling of the thermal engine in thermal mode and also to improve the temperature rise of the engine and the heating of the cockpit.
  • a method for controlling a vehicle powertrain in which two or more normally functioning cooling circuits are connected to each other or connected by means of at least one valve. a heat engine and at least one electrical member.
  • normal operation is meant a fault-free operation of the members of each circuit.
  • the electrical member or one of the electrical members comprises a motor; - the setting is made or maintained in communication when the vehicle moves by means of the single electric motor, for example during a cold start, when heating the cabin is requested, or when engine cooling thermal and / or turbocharger is required;
  • the setting or keeping in communication is carried out when the vehicle moves simultaneously by means of the thermal and electric engines, for example during a cold start;
  • the setting or holding is made in communication when the vehicle moves by means of the single heat engine, for example when a temperature of a liquid of the circuit associated with the heat engine exceeds a predetermined threshold;
  • the interruption is carried out or maintained when the vehicle moves by means of the single heat engine, for example during a cold or hot start or during a hot run;
  • the interruption is carried out or maintained when the vehicle moves simultaneously by means of the thermal and electrical engines, for example when a liquid in the circuit associated with the heat engine exceeds a second predetermined threshold.
  • the invention also provides a vehicle comprising:
  • Two cooling circuits respectively associated with a heat engine and at least one electrical member; and at least one circuit communication valve, the control means being arranged to control the putting into or keeping in communication of the circuits operating in a normal manner.
  • the vehicle according to the invention may also have at least one of the following characteristics: the number of valves is less than or equal to two; and
  • FIG. schematic view of the cooling circuits in a vehicle according to a preferred embodiment of the invention
  • FIG. 2 shows the different positions of the valve forming part of the circuit of Figure 1;
  • FIGS. 3 to 8 show the circuits of FIG. 1 in other operating circumstances.
  • Figure 9 is a diagram similar to that of Figure 1 showing an alternative embodiment.
  • the vehicle comprises a heat engine 2 associated with a cooling circuit 4.
  • This circuit comprises a pump to water 6 is mechanical and driven by the engine or electric.
  • the circuit 4 contains a cooling radiator 8 called high temperature radiator or heat radiator.
  • the circuit 4 also comprises a heater 10 or heating radiator of the passenger compartment.
  • This same circuit comprises in this case a thermostat 12 in the form of a wax thermostat, a controlled thermostat or a controlled valve, for regulating the temperature of the coolant circulating in the circuit 4.
  • the circuit may comprise other conventional members according to the technical definition of the engine and whether it is a spark ignition engine or spontaneous ignition. These organs will be for example:
  • the circuit includes a circuit filling and degassing jar not shown. It also possibly includes one of the two electrical machines 16 for example the generator.
  • the powertrain comprises in addition to the electric machine 16 a second electrical machine 18 such as a motor and electronic power components 20 and 22.
  • a cooling circuit 24 separate from the circuit 4 is associated with these elements. It is a so-called low temperature circuit which comprises:
  • a cooling radiator 26 called a low-temperature radiator or an electric radiator
  • the heater 10 As an optional jar 30 degassing.
  • the heater 10, the electrical machine 16, the exchanger 14 and the radiator 8 are arranged in parallel with the branch carrying the heat engine 2 and the pump 6.
  • the two circuits 4 and 24 are in fluid communication.
  • a first communication conduit 32 connects a point located on the low temperature circuit 24 between the jar 30 and the radiator 26 at the end of the branch carrying the heater 10 in the high temperature circuit 4. It s is a flow conduit for passing the liquid from the circuit 24 to the circuit 4.
  • a return conduit 33 is provided parallel to the other end of the branch carrying the heater in the circuit 4, and causing the liquid to a point located between the radiator 26 and the power component 22.
  • a three-way valve V2 40 is positioned in the circuit 24 at the intersection between the forward conduit 32 and this circuit.
  • the cooling liquid used in these two circuits is here a mixture of water and ethylene glycol or any other liquid whose thermophysical properties are close to this mixture.
  • the engine is a spontaneous ignition engine requiring the use of a recirculated coolant / recirculated exhaust gas exchanger 14. But this is only an example.
  • - Electric mode the vehicle is powered and / or towed by the electric motor 18 without the intervention of the engine
  • - Thermal mode the vehicle is powered and / or towed by means of the single engine, without the intervention of the electric motor
  • - Hybrid mode the vehicle is propelled and / or towed by means of both the thermal and electric engines.
  • FIG. 1 This operating circumstance corresponds to FIG. 1.
  • the valve 40 is controlled so that it closes the access to the low-temperature radiator 26.
  • the circulation of the liquid is then effected according to the arrows indicated in FIG. 1.
  • the liquid travels in this order the components 22, 20, 18, 28, 30 then crosses the valve 40 to pass through the conduit 32. It then goes through the different branches of the circuit 4 except for the radiator 8 and returns to the circuit 24 at means of the conduit 33.
  • the power dissipated by the electrotechnical devices can improve the temperature rise of the engine and dissipate a thermal power at the heater in case a request for o heating of the passenger compartment is made.
  • This mode corresponds to that of FIG. 3.
  • the two mechanical and electric pumps 6 and 6 operate.
  • the communication between the high and low temperature circuits is put in place and / or maintained since it again makes it possible to use the power dissipated by the electrotechnical components in order to improve the rise in temperature of the coolant and the engine. It 0 also improves the rise in temperature of the cabin via the power dissipated to the heater during a heating demand.
  • the valve V2 closes the access to the low temperature radiator and is thus as for Figure 1 in position 1.
  • the thermostat 12 of the high temperature circuit opens so that the coolant is cooled at the heat sink.
  • the opening of the thermostat is around 85 or 90 ° C.
  • the thermostat is in a controlled configuration in which case its opening temperature may be higher. It will for example be set at 110 ° C for a power demand to the low motor shaft.
  • This thermostat can also be replaced by a pilot valve. In such circumstances, the valve 40 is placed so that the interruption of communication between the two circuits is realized or maintained. The valve is therefore here again in position 3.
  • Mode 5 - Rolling in thermal mode very hot liquid
  • This mode illustrated in Figure 6 corresponds for example to the case where the liquid in the high temperature circuit is at about 100 ° C.
  • a threshold such as 90 or 95 ° C.
  • Running in a very hot thermal mode is performed when the vehicle is only powered or towed by the engine and the electrotechnical organs do not work. During this mode of running, the heat engine dissipates a lot of thermal power to the coolant, for example 6OkW. Since electrotechnical devices do not work, they do not need cooling. This is why it is made that the electric radiator 26 then helps the cooling of the engine.
  • the position of the valve is the position 2 so that the liquid coming from the circuit 4 through the return duct 33 is conveyed integrally in the electric radiator 26 and is then directed by the valve in the forward duct 32.
  • the operating mode can be met by high temperature or for particularly high demands on the power of the heat engine shaft, in particular with a high forward speed.
  • the temperature in the passenger compartment decreases rapidly because the power dissipated at the level of the heater to the cabin uses only the stored energy within the volume of water included in this unit heater. If a coolant flow is maintained in the cooling circuit by the electric water pump of the low temperature circuit, the thermal comfort is maintained much longer. Specifically, during a prolonged stop of the vehicle while the driver or passengers remain in the vehicle, the circulation of liquid generated by the operation of the electric water pump can maintain comfort in the passenger compartment for example for thirty minutes by -20 ° C outside temperature. Conversely, without circulation of water at the end of the engine and the vehicle, the comfort would be maintained for only five minutes.
  • a circulation of water within the engine limits the thermomechanical stresses within it.
  • the circulation of the coolant makes it possible to reduce the temperature of the engine without there being any boiling phenomenon located within the cylinder head or the engine block.
  • post cooling It is the same for the engine of the engine such as turbocharger bearings that require post cooling after a ride where the engine was very stressed.
  • FIG. 9 illustrates an alternative embodiment of the invention.
  • the valve 40 is a two-way valve positioned between the upstream end of the forward duct 32 and optionally the electric heater 26 or the jar 30.
  • an additional valve V1 42 positioned on the duct. return 33.
  • This last valve is an all-or-nothing valve.
  • the invention has many advantages. It helps the cooling of the thermal engine in thermal rolling beyond, for example, a speed threshold of the vehicle such as 130 km / h. It uses the power dissipated by the electrotechnical organs to improve the temperature rise of the engine, the passenger compartment or any other organ that needs to reach a high operating temperature as quickly as possible.
  • This is, for example, a heat engine / coolant lubricating oil exchanger, a gearbox / coolant lubricating oil exchanger, a recirculated exhaust gas / liquid exchanger. cooling or heat exchanger air intake of the engine / coolant. This action reduces pollutant emissions (especially HC and CO) and fuel consumption.
  • the invention makes it possible to reduce the operating time and the cost of the additional electric water pump dedicated to the cooling of the electrotechnical organs.
  • the electrical contacts of a pump as well as other electric motors are provided by brushes or coals. These components are cheap but their duration of life is limited. We know a brushless technology that has a longer life but whose cost is twice as high. It is therefore interesting to operate the pump as little as possible so that it consumes less and also for its low cost. Thus the coupling of the high temperature circuit and the low temperature circuit makes it possible to satisfy all the needs mentioned above.
  • the invention can be implemented including high and low temperature cooling circuits coupled together, for example on conventional vehicles, for applications such as charge air cooling, recirculated exhaust gases, and water / oil exchangers for the engine or gearbox. Indeed, the coupling of two circuits improves the rise in temperature of the engine and the passenger compartment.

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  • General Engineering & Computer Science (AREA)
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Abstract

The invention concerns a method for controlling a vehicle drive train, which consists in communicating or maintaining in communication via at least one valve (40) two cooling circuits (4, 24) operating normally and respectively associated with a heat engine (2) and with at least one electrical member (18, 20, 22).

Description

L'invention concerne la commande des groupes motopropulseurs de véhicules automobiles et en particulier celle de leurs circuits de refroidissement. The invention relates to the control of powertrains of motor vehicles and in particular that of their cooling circuits.

On sait que les véhicules hybrides sont équipés d'un groupe motopropulseur comportant un moteur thermique, une ou deux machines électriques, des composants électroniques de puissance et une batterie de puissance.It is known that hybrid vehicles are equipped with a power train comprising a heat engine, one or two electrical machines, electronic power components and a power battery.

Le moteur thermique peut être utilisé pour recharger les batteries via un générateur et/ou pour tracter ou propulser le véhicule. Dans le cas où le moteur thermique recharge uniquement les batteries du véhicule, on parle de véhicule hybride série. Dans le cas où le moteur thermique tracte et/ou propulse le véhicule, on parle de véhicule hybride parallèle.The heat engine can be used to recharge the batteries via a generator and / or to tow or propel the vehicle. In the case where the engine only recharges the vehicle's batteries, it is called a hybrid series vehicle. In the case where the heat engine tows and / or propels the vehicle, it is called parallel hybrid vehicle.

Quelle que soit l'architecture reliant le moteur thermique et la ou les machines électriques, il est nécessaire de refroidir le moteur thermique, la ou les machines électriques et les composants électroniques de puissance.Regardless of the architecture linking the heat engine and the electrical machine or machines, it is necessary to cool the heat engine, the electrical machine (s) and the electronic power components.

Cependant, le niveau de température du liquide de refroidissement des organes électrotechniques (la ou les machines électriques et les composants électroniques de puissance) et le niveau de température du liquide de refroidissement du moteur thermique ne sont pas les mêmes. En effet, afin d'améliorer la fiabilité des organes électrotechniques (notamment de l'électronique de puissance), la température du liquide de refroidissement ne doit pas dépasser un seuil tel que 70°C. Et de manière conventionnelle, le liquide de refroidissement du moteur thermique ne doit pas quant à lui excéder un seuil tel que 100°C. Par conséquent, il est intéressant d'utiliser deux circuits de refroidissement afin de respecter le cahier des charges thermiques des organes du groupe motopropulseur hybride, à savoir un circuit à basse température pour les organes électrotechniques et un circuit à haute température pour le moteur thermique. L'utilisation de deux circuits de refroidissement totalement séparés ou en contact via un bocal de dégazage oblige à faire fonctionner en permanence une pompe à eau électrique additionnelle augmentant alors la consommation électrique du véhicule, la durée de vie de la pompe électrique et son coût. Il oblige aussi à utiliser dans certains cas deux bocaux de dégazage. On rappelle aussi que pour les moteurs thermiques équipés d'un turbocompresseur, il est devenu courant d'utiliser une pompe à eau électrique afin de refroidir les paliers du turbocompresseur lors de l'arrêt du moteur thermique. Il est aussi nécessaire d'utiliser une pompe à eau électrique sur un véhicule hybride pour le maintien du confort au sein de l'habitacle lors de l'arrêt du moteur thermique lorsque le véhicule est arrêté ou lorsque l'on roule en mode électrique.However, the temperature level of the coolant electrotechnical organs (the one or more electrical machines and electronic power components) and the temperature level of the coolant of the engine are not the same. In fact, in order to improve the reliability of the electrotechnical components (in particular the power electronics), the temperature of the coolant must not exceed a threshold such as 70 ° C. And conventionally, the coolant of the engine must not exceed a threshold such as 100 ° C. Therefore, it is interesting to use two cooling circuits in order to comply with the thermal specifications of the components of the hybrid powertrain, namely a low temperature circuit for the electrotechnical organs and a high temperature circuit for the engine. The use of two completely separate cooling circuits or in contact via a degassing jar forces to operate in Permanently an additional electric water pump then increasing the power consumption of the vehicle, the life of the electric pump and its cost. It also requires the use in some cases two jars degassing. It is also recalled that for heat engines equipped with a turbocharger, it has become common to use an electric water pump to cool the bearings of the turbocharger when stopping the engine. It is also necessary to use an electric water pump on a hybrid vehicle to maintain comfort in the passenger compartment when stopping the engine when the vehicle is stopped or when driving in electric mode.

On connaît du document JP-2004 07 66 03 un véhicule dans lequel les deux circuits de refroidissement associés respectivement au moteur thermique et au moteur électrique peuvent être mis en communication de fluide en cas de défaillance de la pompe de l'un des circuits. La mise en communication est limitée à cette circonstance anormale.Document JP-2004 07 66 03 discloses a vehicle in which the two cooling circuits associated respectively with the heat engine and the electric motor can be placed in fluid communication in the event of failure of the pump of one of the circuits. The setting in communication is limited to this abnormal circumstance.

Un but de l'invention est d'améliorer le fonctionnement des groupes motopropulseurs, en particulier mais non exclusivement dans le cas des véhicules hybrides pour améliorer le refroidissement du moteur thermique en mode thermique et aussi améliorer la montée en température du moteur thermique et du chauffage de l'habitacle.An object of the invention is to improve the operation of the powertrains, particularly but not exclusively in the case of hybrid vehicles to improve the cooling of the thermal engine in thermal mode and also to improve the temperature rise of the engine and the heating of the cockpit.

A cet effet, on prévoit selon l'invention un procédé de commande d'un groupe motopropulseur de véhicule, dans lequel on met ou on maintient en communication au moyen d'au moins une vanne deux circuits de refroidissement fonctionnant de façon normale et associés respectivement à un moteur thermique et à au moins un organe électrique.For this purpose, according to the invention there is provided a method for controlling a vehicle powertrain, in which two or more normally functioning cooling circuits are connected to each other or connected by means of at least one valve. a heat engine and at least one electrical member.

On entend par fonctionnement normal un fonctionnement sans défaillance des organes de chaque circuit.By normal operation is meant a fault-free operation of the members of each circuit.

Le procédé selon l'invention pourra présenter en outre au moins l'une quelconque des caractéristiques suivantes :The method according to the invention may also have at least one of the following characteristics:

- l'organe électrique ou l'un des organes électriques comprend un moteur ; - on effectue la mise ou le maintien en communication lorsque le véhicule se déplace au moyen du seul moteur électrique, par exemple lors d'un démarrage à froid, lorsqu'un chauffage de l'habitacle est demandé, ou lorsqu'un refroidissement du moteur thermique et/ou d'un turbocompresseur est demandé ;the electrical member or one of the electrical members comprises a motor; - the setting is made or maintained in communication when the vehicle moves by means of the single electric motor, for example during a cold start, when heating the cabin is requested, or when engine cooling thermal and / or turbocharger is required;

- on effectue la mise ou le maintien en communication lorsque le véhicule se déplace simultanément au moyen des moteurs thermique et électrique, par exemple lors d'un démarrage à froid ;- The setting or keeping in communication is carried out when the vehicle moves simultaneously by means of the thermal and electric engines, for example during a cold start;

- on effectue la mise ou le maintien en communication lorsque le véhicule se déplace au moyen du seul moteur thermique, par exemple lorsqu'une température d'un liquide du circuit associé au moteur thermique dépasse un seuil prédéterminé ;the setting or holding is made in communication when the vehicle moves by means of the single heat engine, for example when a temperature of a liquid of the circuit associated with the heat engine exceeds a predetermined threshold;

- on interrompt ensuite la communication ;- the communication is interrupted;

- on effectue ou on maintient l'interruption lorsque le véhicule se déplace au moyen du seul moteur thermique, par exemple lors d'un démarrage à froid ou à chaud ou lors d'un roulage à chaud ; etthe interruption is carried out or maintained when the vehicle moves by means of the single heat engine, for example during a cold or hot start or during a hot run; and

- on effectue ou on maintient l'interruption lorsque le véhicule se déplace simultanément au moyen des moteurs thermique et électrique, par exemple lorsqu'un liquide dans le circuit associé au moteur thermique dépasse un deuxième seuil prédéterminé.the interruption is carried out or maintained when the vehicle moves simultaneously by means of the thermal and electrical engines, for example when a liquid in the circuit associated with the heat engine exceeds a second predetermined threshold.

On prévoit également selon l'invention un véhicule comprenant :The invention also provides a vehicle comprising:

- des moyens de commande ;control means;

- deux circuits de refroidissement associés respectivement à un moteur thermique et à au moins un organe électrique ; et - au moins une vanne de mise en communication des circuits, les moyens de commande étant agencés pour commander la mise ou le maintien en communication des circuits fonctionnant de façon normale.- Two cooling circuits respectively associated with a heat engine and at least one electrical member; and at least one circuit communication valve, the control means being arranged to control the putting into or keeping in communication of the circuits operating in a normal manner.

Le véhicule selon l'invention pourra présenter en outre au moins l'une quelconque des caractéristiques suivantes : - le nombre de vannes est inférieur ou égal à deux ; etThe vehicle according to the invention may also have at least one of the following characteristics: the number of valves is less than or equal to two; and

- la vanne ou l'une au moins des vannes est une vanne à trois positions. D'autres caractéristiques et avantages de l'invention apparaîtront encore dans la description suivante d'un mode préféré de réalisation et d'une variante donnés à titre d'exemples non limitatifs en référence aux dessins annexés sur lesquels : - la figure 1 est une vue schématique des circuits de refroidissement dans un véhicule selon un mode préféré de réalisation de l'invention ;the valve or at least one of the valves is a three-position valve. Other features and advantages of the invention will become apparent from the following description of a preferred embodiment and a variant given as non-limiting examples with reference to the accompanying drawings, in which: FIG. schematic view of the cooling circuits in a vehicle according to a preferred embodiment of the invention;

- la figure 2 montre les différentes positions de la vanne faisant partie du circuit de la figure 1 ;- Figure 2 shows the different positions of the valve forming part of the circuit of Figure 1;

- les figures 3 à 8 présentent les circuits de la figure 1 dans d'autres circonstances de fonctionnement ; etFIGS. 3 to 8 show the circuits of FIG. 1 in other operating circumstances; and

- la figure 9 est un schéma analogue à celui de la figure 1 présentant une variante de réalisation.- Figure 9 is a diagram similar to that of Figure 1 showing an alternative embodiment.

On a illustré un mode préféré de réalisation d'un véhicule selon l'invention à la figure 1. Sur celle-ci, on observe que le véhicule comprend un moteur thermique 2 associé à un circuit de refroidissement 4. Ce circuit comprend une pompe à eau 6 soit mécanique et entraînée par le moteur thermique, soit électrique. Le circuit 4 contient un radiateur de refroidissement 8 appelé radiateur haute température ou radiateur thermique. Le circuit 4 comprend également un aérotherme 10 ou radiateur de chauffage de l'habitacle. Ce même circuit comprend en l'espèce un thermostat 12 sous la forme d'un thermostat à cire, d'un thermostat piloté ou encore d'une vanne pilotée, permettant de réguler la température du liquide de refroidissement circulant dans le circuit 4. Le circuit peut comprendre d'autres organes conventionnels selon la définition technique du moteur thermique et selon qu'il s'agit d'un moteur à allumage commandé ou à allumage spontané. Ces organes seront par exemple :There is illustrated a preferred embodiment of a vehicle according to the invention in Figure 1. On it, it is observed that the vehicle comprises a heat engine 2 associated with a cooling circuit 4. This circuit comprises a pump to water 6 is mechanical and driven by the engine or electric. The circuit 4 contains a cooling radiator 8 called high temperature radiator or heat radiator. The circuit 4 also comprises a heater 10 or heating radiator of the passenger compartment. This same circuit comprises in this case a thermostat 12 in the form of a wax thermostat, a controlled thermostat or a controlled valve, for regulating the temperature of the coolant circulating in the circuit 4. The circuit may comprise other conventional members according to the technical definition of the engine and whether it is a spark ignition engine or spontaneous ignition. These organs will be for example:

- un échangeur liquide de refroidissement / huile de lubrification du moteur thermique ;- a coolant / lubricating oil heat exchanger of the engine;

- un échangeur liquide de refroidissement / huile de lubrification de la boîte de vitesse ; ou- a coolant / lubricating oil exchanger for the gearbox; or

- un échangeur liquide de refroidissement / gaz d'échappement recirculé 14, - les paliers de turbocompresseur,a cooled liquid / recirculated exhaust gas exchanger 14, - the turbocharger bearings,

- le boîtier de papillon motorisé.- the motorized throttle body.

Le circuit comprend un bocal de remplissage du circuit et de dégazage non illustré. Il comprend également éventuellement une des deux machines électriques 16 par exemple le générateur.The circuit includes a circuit filling and degassing jar not shown. It also possibly includes one of the two electrical machines 16 for example the generator.

Le groupe motopropulseur comprend en plus de la machine électrique 16 une deuxième machine électrique 18 telle qu'un moteur ainsi que des composant électroniques de puissance 20 et 22. Un circuit de refroidissement 24 distinct du circuit 4 est associé à ces éléments. Il s'agit d'un circuit dit basse température qui comporte :The powertrain comprises in addition to the electric machine 16 a second electrical machine 18 such as a motor and electronic power components 20 and 22. A cooling circuit 24 separate from the circuit 4 is associated with these elements. It is a so-called low temperature circuit which comprises:

- un radiateur de refroidissement 26 appelé radiateur basse température ou radiateur électrique ;a cooling radiator 26 called a low-temperature radiator or an electric radiator;

- une pompe à eau électrique 28 ; etan electric water pump 28; and

- à titre optionnel un bocal 30 de dégazage. Dans le circuit haute température 4, l'aérotherme 10, la machine électrique 16, l'échangeur 14 et le radiateur 8 sont disposés en parallèle avec la branche portant le moteur thermique 2 et la pompe 6.- As an optional jar 30 degassing. In the high temperature circuit 4, the heater 10, the electrical machine 16, the exchanger 14 and the radiator 8 are arranged in parallel with the branch carrying the heat engine 2 and the pump 6.

Dans le circuit basse température 24, tous les composants qui ont été présentés sont disposés en série dans une boucle unique. Ces deux circuits sont appelés circuits de refroidissement mais il est plus rigoureux de les appeler circuit de refroidissement ou de réchauffage car on verra qu'ils permettent aussi de réchauffer certains organes.In the low temperature circuit 24, all the components that have been presented are arranged in series in a single loop. These two circuits are called cooling circuits but it is more rigorous to call them cooling or heating circuit because we will see that they can also heat some organs.

Conformément à l'invention, les deux circuits 4 et 24 sont en communication de fluide. En l'espèce, un premier conduit de communication 32 relie un point situé sur le circuit basse température 24 entre le bocal 30 et le radiateur 26 à l'extrémité de la branche portant l'aérotherme 10 dans le circuit haute température 4. Il s'agit d'un conduit aller permettant de faire passer le liquide du circuit 24 au circuit 4. Un conduit retour 33 est prévu parallèlement, à l'autre extrémité de la branche portant l'aérotherme dans le circuit 4, et amenant le liquide à un point situé entre le radiateur 26 et le composant de puissance 22. En outre, une vanne V2 40 à trois voies est positionnée dans le circuit 24 à l'intersection entre le conduit aller 32 et ce circuit.According to the invention, the two circuits 4 and 24 are in fluid communication. In this case, a first communication conduit 32 connects a point located on the low temperature circuit 24 between the jar 30 and the radiator 26 at the end of the branch carrying the heater 10 in the high temperature circuit 4. It s is a flow conduit for passing the liquid from the circuit 24 to the circuit 4. A return conduit 33 is provided parallel to the other end of the branch carrying the heater in the circuit 4, and causing the liquid to a point located between the radiator 26 and the power component 22. In addition, a three-way valve V2 40 is positioned in the circuit 24 at the intersection between the forward conduit 32 and this circuit.

Les trois positions que peut occuper l'élément mobile de cette vanne ont été illustrées en détail à la figure 2. Ainsi pour passer de la position 1 à la position 2, une rotation de 180° de cet élément est nécessaire. Pour passer de la position 2 à la position 3, une rotation de 90° dans le même sens suffit puis une nouvelle rotation de 90° dans le même sens permet de replacer cet élément en position 1.The three positions that can occupy the movable member of this valve have been illustrated in detail in Figure 2. Thus to move from position 1 to position 2, a 180 ° rotation of this element is necessary. To go from position 2 to position 3, a rotation of 90 ° in the same direction is enough then a new rotation of 90 ° in the same direction makes it possible to replace this element in position 1.

Dans la position 1 , la communication en direction du radiateur 26 est coupée. En position 2, c'est la communication en provenance du bocal qui l'est. En position 3, c'est le cas pour la communication avec le conduit 32. La communication entre les deux autres conduits est à chaque fois autorisée.In the position 1, the communication towards the radiator 26 is cut off. In position 2, it is the communication from the jar that is. In position 3, this is the case for the communication with the conduit 32. The communication between the two other conduits is each time authorized.

Le liquide de refroidissement utilisé dans ces deux circuits est ici un mélange d'eau et d'éthylène glycol ou tout autre liquide dont les propriétés thermophysiques sont proches de ce mélange.The cooling liquid used in these two circuits is here a mixture of water and ethylene glycol or any other liquid whose thermophysical properties are close to this mixture.

Naturellement, d'autres organes que ceux qui ont été présentés peuvent être intégrés aux circuits basse température et haute température.Naturally, other organs than those presented can be integrated in the low temperature and high temperature circuits.

Dans le présent exemple, le moteur thermique est un moteur à allumage spontané nécessitant l'utilisation d'un échangeur 14 liquide de refroidissement / gaz d'échappement recirculé. Mais il ne s'agit ici que d'un exemple.In the present example, the engine is a spontaneous ignition engine requiring the use of a recirculated coolant / recirculated exhaust gas exchanger 14. But this is only an example.

On va maintenant décrire différentes circonstances de fonctionnement du moteur et les configurations des circuits correspondantes telles qu'elles sont commandées par l'ordinateur de bord du véhicule conformément au procédé de l'invention.Different operating circumstances of the engine and the configurations of the corresponding circuits as they are controlled by the on-board computer of the vehicle according to the method of the invention will now be described.

On retient les définitions suivantes pour les différents modes de fonctionnement :The following definitions are retained for the different modes of operation:

- mode électrique : le véhicule est propulsé et/ou tracté grâce au moteur électrique 18 sans l'intervention du moteur thermique ; - mode thermique : le véhicule est propulsé et/ou tracté au moyen du seul moteur thermique, sans donc l'intervention du moteur électrique ; et - mode hybride : le véhicule est propulsé et/ou tracté au moyen simultanément des moteurs thermique et électrique.- Electric mode: the vehicle is powered and / or towed by the electric motor 18 without the intervention of the engine; - Thermal mode: the vehicle is powered and / or towed by means of the single engine, without the intervention of the electric motor; and - Hybrid mode: the vehicle is propelled and / or towed by means of both the thermal and electric engines.

Mode 1 - Roulage en mode électrique lors d'un démarrage à froidMode 1 - Electric driving during a cold start

55

Cette circonstance de fonctionnement correspond à la figure 1. Lors d'un roulage en mode électrique, parmi les deux pompes, seule la pompe à eau électrique 28 du circuit basse température 24 fonctionne puisque le moteur thermique 2 et sa pompe 6 sont à l'arrêt. Dans ce cas, on commande 0 la vanne 40 de sorte qu'elle ferme l'accès au radiateur basse température 26. La circulation du liquide se fait alors suivant les flèches indiquées à la figure 1. En d'autres termes, le liquide parcourt dans cet ordre les composants 22, 20, 18, 28, 30 puis traverse la vanne 40 pour passer dans le conduit 32. Il parcourt ensuite les différentes branches du circuit 4 à 5 l'exception du radiateur 8 et revient dans le circuit 24 au moyen du conduit 33. Ainsi, lors d'un démarrage à froid du véhicule en mode électrique, la puissance dissipée par les organes électrotechniques permet d'améliorer la montée en température du moteur thermique et de dissiper une puissance thermique au niveau de l'aérotherme dans le cas où une demande de o chauffage de l'habitacle est faite.This operating circumstance corresponds to FIG. 1. During a running in electrical mode, of the two pumps, only the electric water pump 28 of the low temperature circuit 24 operates since the heat engine 2 and its pump 6 are at the same time. stop. In this case, the valve 40 is controlled so that it closes the access to the low-temperature radiator 26. The circulation of the liquid is then effected according to the arrows indicated in FIG. 1. In other words, the liquid travels in this order the components 22, 20, 18, 28, 30 then crosses the valve 40 to pass through the conduit 32. It then goes through the different branches of the circuit 4 except for the radiator 8 and returns to the circuit 24 at means of the conduit 33. Thus, during a cold start of the vehicle in electric mode, the power dissipated by the electrotechnical devices can improve the temperature rise of the engine and dissipate a thermal power at the heater in case a request for o heating of the passenger compartment is made.

Mode 2 - Roulage en mode hybride lors d'un démarrage à froidMode 2 - Hybrid driving during a cold start

Ce mode correspond à celui de la figure 3. Lors d'un roulage en mode 5 hybride, les deux pompes mécanique 6 et électrique 28 fonctionnent. La communication entre les circuits haute et basse température est mise en place et/ou maintenue puisqu'elle permet là encore d'utiliser la puissance dissipée par les organes électrotechniques afin d'améliorer la montée en température du liquide de refroidissement et du moteur thermique. Elle 0 permet aussi d'améliorer la montée en température de l'habitacle via la puissance dissipée à l'aérotherme lors d'une demande de chauffage. Comme précédemment, la vanne V2 ferme l'accès au radiateur basse température et se trouve donc comme pour la figure 1 en position 1.This mode corresponds to that of FIG. 3. During a hybrid mode run, the two mechanical and electric pumps 6 and 6 operate. The communication between the high and low temperature circuits is put in place and / or maintained since it again makes it possible to use the power dissipated by the electrotechnical components in order to improve the rise in temperature of the coolant and the engine. It 0 also improves the rise in temperature of the cabin via the power dissipated to the heater during a heating demand. As previously, the valve V2 closes the access to the low temperature radiator and is thus as for Figure 1 in position 1.

Mode 3 - Roulage en mode thermique lors d'un démarrage à froidMode 3 - Rolling in thermal mode during a cold start

Dans ce mode illustré à la figure 4, en mode thermique et démarrage à froid, parmi les deux pompes, seule la pompe à eau mécanique 6 fonctionne. Les composants électrotechniques 18, 20 et 22 ne fonctionnent pas. On place ou on maintient donc la vanne en position 3 de sorte qu'elle ferme l'accès au conduit aller 32. Dans ces conditions, la communication de fluide entre les deux circuits est interrompue. Le moteur thermique s'échauffe seul comme cela se produit sur une chaîne de traction ou de propulsion d'un véhicule conventionnel c'est-à-dire non hybride.In this mode illustrated in Figure 4, in thermal mode and cold start, of the two pumps, only the mechanical water pump 6 works. The electrotechnical components 18, 20 and 22 do not work. The valve is thus placed or held in position 3 so that it closes the access to the forward duct 32. Under these conditions, the fluid communication between the two circuits is interrupted. The heat engine heats alone as occurs on a traction or propulsion system of a conventional vehicle that is to say non-hybrid.

Mode 4 - Roulage en mode thermique avec un liquide chaudMode 4 - Rolling in thermal mode with a hot liquid

Dans ce mode illustré à la figure 5, le thermostat 12 du circuit haute température s'ouvre pour que le liquide de refroidissement soit refroidi au niveau du radiateur thermique. Concrètement, on peut prévoir que l'ouverture du thermostat se fait aux environs de 85 ou 90°C. Mais il est possible que le thermostat soit dans une configuration pilotée auquel cas sa température d'ouverture peut être plus élevée. Elle sera par exemple fixée à 110°C pour une demande de puissance à l'arbre moteur faible. Ce thermostat peut aussi être remplacé par une vanne pilotée. Dans de telles circonstances, on place la vanne 40 de sorte que l'interruption de communication entre les deux circuits est réalisée ou maintenue. La vanne se trouve donc ici encore en position 3.In this mode illustrated in Figure 5, the thermostat 12 of the high temperature circuit opens so that the coolant is cooled at the heat sink. Concretely, it can be expected that the opening of the thermostat is around 85 or 90 ° C. But it is possible that the thermostat is in a controlled configuration in which case its opening temperature may be higher. It will for example be set at 110 ° C for a power demand to the low motor shaft. This thermostat can also be replaced by a pilot valve. In such circumstances, the valve 40 is placed so that the interruption of communication between the two circuits is realized or maintained. The valve is therefore here again in position 3.

Mode 5 - Roulage en mode thermique, liquide très chaud Ce mode illustré à la figure 6 correspond par exemple au cas où le liquide dans le circuit haute température est à environ 100°C. On prévoira par exemple que la température du liquide dépasse un seuil tel que 90 ou 95 °C. Le roulage en mode thermique très chaud est réalisé lorsque le véhicule est uniquement propulsé ou tracté par le moteur thermique et que les organes électrotechniques ne fonctionnent pas. Durant ce mode de roulage, le moteur thermique dissipe beaucoup de puissance thermique au liquide de refroidissement, par exemple 6OkW. Etant donné que les organes électrotechniques ne fonctionnent pas, ils n'ont pas besoin de refroidissement. C'est pourquoi on fait en sorte que le radiateur électrique 26 aide alors au refroidissement du moteur thermique. Pour cela, la position de la vanne est la position 2 de sorte que le liquide venant du circuit 4 par le conduit de retour 33 est acheminé intégralement dans le radiateur électrique 26 puis est dirigé par la vanne dans le conduit aller 32. Une telle circonstance de fonctionnement peut se rencontrer par température élevée ou pour des demandes de puissance à l'arbre du moteur thermique particulièrement importantes, notamment en vitesse d'avancement élevée.Mode 5 - Rolling in thermal mode, very hot liquid This mode illustrated in Figure 6 corresponds for example to the case where the liquid in the high temperature circuit is at about 100 ° C. For example, it will be provided that the temperature of the liquid exceeds a threshold such as 90 or 95 ° C. Running in a very hot thermal mode is performed when the vehicle is only powered or towed by the engine and the electrotechnical organs do not work. During this mode of running, the heat engine dissipates a lot of thermal power to the coolant, for example 6OkW. Since electrotechnical devices do not work, they do not need cooling. This is why it is made that the electric radiator 26 then helps the cooling of the engine. For this, the position of the valve is the position 2 so that the liquid coming from the circuit 4 through the return duct 33 is conveyed integrally in the electric radiator 26 and is then directed by the valve in the forward duct 32. Such a circumstance The operating mode can be met by high temperature or for particularly high demands on the power of the heat engine shaft, in particular with a high forward speed.

Mode 6 - Roulage en mode hybride avec liquide chaud ou très chaudMode 6 - Hybrid driving with hot or hot fluid

Ce mode correspond à la figure 7. Lors d'un roulage en mode hybride avec un liquide chaud ou très chaud, il faut que les deux radiateurs thermique et électrique soit dimensionnés pour pouvoir dissiper la puissance fournie par le moteur thermique et les organes électrotechniques. Les deux circuits de refroidissement sont alors totalement séparés par la vanne 40 qui est positionnée en position 3 afin de ne pas permettre de communication de fluide entre les circuits. On définira naturellement un ou plusieurs seuils de température adaptés pour permettre aux moyens de commande de placer la vanne dans cette position lorsque ce seuil de température est franchi par le liquide du circuit haute température. Mode 7 - Roulage en mode électrique avec maintien du confort dans l'habitacle et refroidissement à l'arrêt du moteur thermique, des paliers de turbocompresseur et du véhiculeThis mode corresponds to Figure 7. When driving in hybrid mode with a hot or hot liquid, it is necessary that both thermal and electrical radiators are sized to be able to dissipate the power supplied by the engine and electrotechnical organs. The two cooling circuits are then completely separated by the valve 40 which is positioned in position 3 so as not to allow fluid communication between the circuits. Naturally, one or more temperature thresholds will be defined to enable the control means to place the valve in this position when this temperature threshold is crossed by the liquid of the high temperature circuit. Mode 7 - Driving in electric mode with comfort maintained in the passenger compartment and cooling when the engine, turbocharger bearings and the vehicle are stationary

II s'agit du cas de la figure 8. Lorsque le véhicule est arrêté après un roulage pendant lequel le confort thermique au sein de l'habitacle a été atteint, la mise en communication des circuits basse température et haute température au moyen de la vanne permet d'utiliser une seule pompe à eau électrique telle que celle 28 du circuit basse température pour maintenir le confort dans l'habitacle. La vanne est donc positionnée en position 1.This is the case of Figure 8. When the vehicle is stopped after a ride during which the thermal comfort within the passenger compartment has been reached, the communication of the low temperature and high temperature circuits by means of the valve allows to use a single electric water pump such as 28 of the low temperature circuit to maintain comfort in the passenger compartment. The valve is therefore positioned in position 1.

En effet, lorsque le moteur thermique s'arrête, alors qu'un niveau de confort prédéterminé était maintenu au sein de l'habitacle via la puissance thermique dissipée au niveau de l'aérotherme, la température au sein de l'habitacle diminue rapidement car la puissance dissipée au niveau de l'aérotherme vers l'habitacle n'utilise que l'énergie stockée au sein du volume d'eau compris dans cet aérotherme. Si un débit de liquide de refroidissement est maintenu dans le circuit de refroidissement grâce à la pompe à eau électrique du circuit basse température, le confort thermique est maintenu beaucoup plus longtemps. Concrètement, lors d'un arrêt prolongé du véhicule alors que le conducteur ou les passagers restent dans le véhicule, cette circulation de liquide engendrée par le fonctionnement de la pompe à eau électrique permet de maintenir le confort dans l'habitacle par exemple pendant trente minutes par -20°C de température extérieure. A l'inverse, sans circulation d'eau à l'arrêt du moteur thermique et du véhicule, le confort ne serait maintenu que pendant cinq minutes environ.Indeed, when the engine stops, while a predetermined comfort level was maintained within the passenger compartment via the thermal power dissipated at the unit heater, the temperature in the passenger compartment decreases rapidly because the power dissipated at the level of the heater to the cabin uses only the stored energy within the volume of water included in this unit heater. If a coolant flow is maintained in the cooling circuit by the electric water pump of the low temperature circuit, the thermal comfort is maintained much longer. Specifically, during a prolonged stop of the vehicle while the driver or passengers remain in the vehicle, the circulation of liquid generated by the operation of the electric water pump can maintain comfort in the passenger compartment for example for thirty minutes by -20 ° C outside temperature. Conversely, without circulation of water at the end of the engine and the vehicle, the comfort would be maintained for only five minutes.

De plus, une circulation d'eau au sein du moteur thermique, après un roulage, permet de limiter les contraintes thermomécaniques au sein de celui-ci. En effet, la circulation du liquide de refroidissement permet de diminuer la température du moteur sans qu'il y ait de phénomène d'ébullition localisé au sein de la culasse ou du bloc moteur. On rappelle que l'énergie emmagasinée par le moteur est très importante lors d'un roulage. On parle alors de post refroidissement. Il en est de même pour des organes du moteur thermique tels que les paliers du turbocompresseur qui nécessitent un post refroidissement après un roulage où le moteur était très sollicité.In addition, a circulation of water within the engine, after a taxi, limits the thermomechanical stresses within it. Indeed, the circulation of the coolant makes it possible to reduce the temperature of the engine without there being any boiling phenomenon located within the cylinder head or the engine block. It is recalled that the energy stored by the engine is very important when driving. This is called post cooling. It is the same for the engine of the engine such as turbocharger bearings that require post cooling after a ride where the engine was very stressed.

VarianteVariant

On a illustré à la figure 9 une variante de réalisation de l'invention. Dans cette variante, la vanne 40 est une vanne à deux voies positionnée entre l'extrémité amont du conduit aller 32 et au choix le radiateur électrique 26 ou le bocal 30. De plus, on prévoit une vanne supplémentaire V1 42 positionnée sur le conduit de retour 33. Cette dernière vanne est une vanne tout ou rien. Les configurations qui viennent d'être présentées dans les différents modes peuvent être mises en œuvre avec cette variante au moyen des deux vannes.FIG. 9 illustrates an alternative embodiment of the invention. In this variant, the valve 40 is a two-way valve positioned between the upstream end of the forward duct 32 and optionally the electric heater 26 or the jar 30. In addition, there is provided an additional valve V1 42 positioned on the duct. return 33. This last valve is an all-or-nothing valve. The configurations that have just been presented in the different modes can be implemented with this variant by means of the two valves.

L'invention présente de nombreux avantages. Elle aide le refroidissement du moteur thermique en roulage thermique au-delà, par exemple, d'un seuil de vitesse du véhicule tel que 130 km/h. Elle utilise la puissance dissipée par les organes électrotechniques pour améliorer la montée en température du moteur thermique, de l'habitacle ou de tout autre organe nécessitant d'atteindre une température de fonctionnement élevée le plus rapidement possible. Il s'agit par exemple d'un échangeur huile de lubrification du moteur thermique / liquide de refroidissement, d'un échangeur huile de lubrification de la boîte de vitesse / liquide de refroidissement, d'un échangeur gaz d'échappement recirculé / liquide de refroidissement ou d'un échangeur air admission du moteur thermique / liquide de refroidissement. Cette action permet de réduire les émissions de polluant (notamment de HC et de CO) et la consommation de carburant. Ainsi, elle permet d'utiliser les calories dissipées par les organes électrotechniques afin d'améliorer la montée en température du moteur thermique ou de l'habitacle (via l'aérotherme) lorsque l'on roule en mode électrique et que le moteur thermique n'a pas été mis en route depuis une longue durée, par exemple six heures.The invention has many advantages. It helps the cooling of the thermal engine in thermal rolling beyond, for example, a speed threshold of the vehicle such as 130 km / h. It uses the power dissipated by the electrotechnical organs to improve the temperature rise of the engine, the passenger compartment or any other organ that needs to reach a high operating temperature as quickly as possible. This is, for example, a heat engine / coolant lubricating oil exchanger, a gearbox / coolant lubricating oil exchanger, a recirculated exhaust gas / liquid exchanger. cooling or heat exchanger air intake of the engine / coolant. This action reduces pollutant emissions (especially HC and CO) and fuel consumption. Thus, it makes it possible to use the calories dissipated by the electrotechnical organs in order to improve the temperature rise of the engine or of the passenger compartment (via the heater) when driving in electric mode and that the combustion engine has not been started for a long time, for example six hours.

L'invention permet de diminuer la durée de fonctionnement et le coût de la pompe à eau électrique additionnelle dédiée au refroidissement des organes électrotechniques.The invention makes it possible to reduce the operating time and the cost of the additional electric water pump dedicated to the cooling of the electrotechnical organs.

Elle élimine le deuxième bocal de dégazage dédié au circuit basse température dans l'art antérieur.It eliminates the second degassing jar dedicated to the low temperature circuit in the prior art.

Elle permet d'utiliser une seule pompe à eau électrique additionnelle intégrée au sein du circuit basse température pour, lors de l'arrêt du moteur thermique, le refroidissement d'organes sensibles, pour maintenir une circulation d'eau au sein du moteur thermique pour son post refroidissement, voire encore le maintien du confort thermique au sein de l'habitacle.It makes it possible to use a single additional integrated electric water pump within the low temperature circuit for, during the stopping of the thermal engine, the cooling of sensitive organs, to maintain a circulation of water within the heat engine for its after cooling, or even the maintenance of thermal comfort within the cabin.

En arrêt au feu moteur coupé (type « stop and start »), une circulation d'eau de l'aérotherme et du moteur thermique permet de maintenir le confort thermique.When the engine is stopped ("stop and start" type), a circulation of water from the air heater and the engine makes it possible to maintain thermal comfort.

La coupure du moteur après une phase de roulage relativement sévère (comme un arrêt à un péage contact coupé) provoque une surchauffe du moteur et peut même endommager le palier du turbocompresseur et accélérer le vieillissement de l'huile de lubrification. Dès lors, il est très bénéfique que la circulation de l'eau puisse être assurée par la pompe électrique lorsque le moteur est coupé. Sur les moteurs de forte puissance, le refroidissement nécessite un radiateur relativement gros qui est difficilement intégrable sur le véhicule. Dès lors, il est intéressant de pouvoir mettre à disposition du refroidissement du moteur thermique le radiateur des composants électrotechniques.Shutting down the engine after a relatively harsh driving phase (such as stopping at a cut-off toll) causes the engine to overheat and can even damage the turbocharger bearing and accelerate the aging of the lubricating oil. Therefore, it is very beneficial that the flow of water can be provided by the electric pump when the engine is cut. On high-power engines, cooling requires a relatively large radiator that is difficult to integrate into the vehicle. Therefore, it is interesting to be able to provide heat engine cooling radiator electrotechnical components.

Les contacts électriques d'une pompe tout comme les autres moteurs électriques (démarreur, balai d'essuie-glace, etc.) sont assurés par des balais ou charbons. Ces composants sont bon marché mais leur durée de vie est limitée. On connaît une technologie sans balai qui a une durée de vie plus importante mais dont le coût est deux fois plus élevé. Il est donc intéressant de faire fonctionner la pompe le moins possible pour qu'elle consomme moins et aussi pour son faible coût. Ainsi le couplage du circuit haute température et du circuit basse température permet de satisfaire à l'ensemble des besoins cités ci-dessus.The electrical contacts of a pump as well as other electric motors (starter, wiper blade, etc.) are provided by brushes or coals. These components are cheap but their duration of life is limited. We know a brushless technology that has a longer life but whose cost is twice as high. It is therefore interesting to operate the pump as little as possible so that it consumes less and also for its low cost. Thus the coupling of the high temperature circuit and the low temperature circuit makes it possible to satisfy all the needs mentioned above.

Bien entendu, on pourra apporter à l'invention de nombreuses modifications sans sortir du cadre de celle-ci.Of course, we can bring to the invention many changes without departing from the scope thereof.

On peut mettre en œuvre l'invention comprenant des circuits de refroidissement haute et basse température couplés entre eux, par exemple sur des véhicules conventionnels, pour des applications comme le refroidissement de l'air de suralimentation, des gaz d'échappement recirculés, et des échangeurs eau/huile pour le moteur thermique ou la boîte de vitesse. En effet, le couplage de deux circuits améliore la montée en température du moteur et de l'habitacle. The invention can be implemented including high and low temperature cooling circuits coupled together, for example on conventional vehicles, for applications such as charge air cooling, recirculated exhaust gases, and water / oil exchangers for the engine or gearbox. Indeed, the coupling of two circuits improves the rise in temperature of the engine and the passenger compartment.

Claims

REVENDICATIONS 1. Procédé de commande d'un groupe motopropulseur de véhicule, caractérisé en ce qu'on met ou on maintient en communication de fluide au moyen d'au moins une vanne (40, 42) deux circuits (4, 24) de refroidissement fonctionnant de façon normale et associés respectivement à un moteur thermique (2) et à au moins un organe électrique (18, 20, 22).A method for controlling a vehicle powertrain, characterized in that two fluid cooling circuits (4, 24) are operated or maintained in fluid communication by means of at least one valve (40, 42). normally and associated respectively with a heat engine (2) and at least one electrical member (18, 20, 22). 2. Procédé selon la revendication précédente, caractérisé en ce que l'organe électrique ou l'un des organes électriques comprend un moteur (18).2. Method according to the preceding claim, characterized in that the electrical member or one of the electrical members comprises a motor (18). 3. Procédé selon la revendication précédente, caractérisé en ce qu'on effectue la mise ou le maintien en communication lorsque le véhicule se déplace au moyen du seul moteur électrique (18).3. Method according to the preceding claim, characterized in that the setting or maintaining in communication when the vehicle moves by means of the single electric motor (18). 4. Procédé selon la revendication précédente, caractérisé en ce qu'on effectue la mise ou le maintien en communication lors d'un démarrage à froid.4. Method according to the preceding claim, characterized in that the setting is made or maintained in communication during a cold start. 5. Procédé selon l'une quelconque des revendications 3 ou 4, caractérisé en ce qu'on effectue la mise ou le maintien en communication lorsqu'un chauffage de l'habitacle est demandé.5. Method according to any one of claims 3 or 4, characterized in that the setting is made or maintained in communication when heating the cabin is requested. 6. Procédé selon l'une quelconque des revendications 3 à 5, caractérisé en ce qu'on effectue la mise ou le maintien en communication lorsqu'un refroidissement du moteur thermique et/ou d'un turbocompresseur est demandé.6. Method according to any one of claims 3 to 5, characterized in that the setting or keeping in communication when cooling of the engine and / or a turbocharger is requested. 7. Procédé selon la revendication 2, caractérisé en ce qu'on effectue la mise ou le maintien en communication lorsque le véhicule se déplace simultanément au moyen des moteurs thermique (2) et électrique (18).7. A method according to claim 2, characterized in that the setting or keeping in communication when the vehicle moves simultaneously by means of the heat engines (2) and electric (18). 06.09.06 06.09.06 8. Procédé selon la revendication précédente, caractérisé en ce qu'on effectue la mise ou le maintien en communication lors d'un démarrage à froid.8. Method according to the preceding claim, characterized in that the setting is made or maintained in communication during a cold start. 9. Procédé selon la revendication 2, caractérisé en ce qu'on effectue la mise ou le maintien en communication lorsque le véhicule se déplace au moyen du seul moteur thermique (2).9. A method according to claim 2, characterized in that the setting is made or kept in communication when the vehicle moves by means of the single engine (2). 10. Procédé selon la revendication précédente, caractérisé en ce qu'on effectue la mise ou le maintien en communication lorsqu'une température d'un liquide du circuit (4) associé au moteur thermique (2) dépasse un seuil prédéterminé.10. Method according to the preceding claim, characterized in that the setting or the holding in communication when a temperature of a liquid of the circuit (4) associated with the heat engine (2) exceeds a predetermined threshold. 1 1. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'on interrompt ensuite la communication.Method according to one of the preceding claims, characterized in that the communication is then interrupted. 12. Procédé selon la revendication précédente, caractérisé en ce qu'on effectue ou on maintient l'interruption lorsque le véhicule se déplace au moyen du seul moteur thermique (2).12. Method according to the preceding claim, characterized in that one carries out or maintains the interruption when the vehicle moves by means of the single engine (2). 13. Procédé selon la revendication précédente, caractérisé en ce qu'on effectue ou on maintient l'interruption lors d'un démarrage à froid.13. The method as claimed in the preceding claim, characterized in that one carries out or maintains the interruption during a cold start. 14. Procédé selon l'une quelconque des revendications 12 à 13, caractérisé en ce qu'on effectue ou on maintient l'interruption lors d'un roulage à chaud.14. Process according to any one of Claims 12 to 13, characterized in that the interruption is carried out or maintained during a hot running. 15. Procédé selon la revendication 1 1 , caractérisé en ce qu'on effectue ou on maintient l'interruption lorsque le véhicule se déplace simultanément au moyen des moteurs thermique (2) et électrique (18).15. The method of claim 1 1, characterized in that one carries or maintains the interruption when the vehicle moves simultaneously by means of the heat engines (2) and electric (18). 06.09.06 06.09.06 16. Procédé selon la revendication précédente, caractérisé en ce qu'on effectue ou on maintient l'interruption lorsqu'un liquide dans le circuit associé au moteur thermique (2) dépasse un deuxième seuil prédéterminé.16. The method as claimed in the preceding claim, characterized in that the interruption or maintenance is maintained when a liquid in the circuit associated with the heat engine (2) exceeds a second predetermined threshold. 17. Véhicule comprenant :17. Vehicle comprising: - des moyens de commande ;control means; - deux circuits de refroidissement (4, 24) associés respectivement à un moteur thermique (2) et à au moins un organe électrique (18, 20, 22) ; et - au moins une vanne (40, 42) de mise en communication des circuits, caractérisé en ce que les moyens de commande sont agencés pour commander la mise ou le maintien en communication des circuits fonctionnant de façon normale.- two cooling circuits (4, 24) associated respectively with a heat engine (2) and at least one electrical member (18, 20, 22); and at least one valve (40, 42) for placing the circuits in communication, characterized in that the control means are arranged to control the placing or keeping in communication of the circuits operating in a normal manner. 18. Véhicule selon la revendication précédente, caractérisé en ce que le nombre de vannes est inférieur ou égal à deux.18. Vehicle according to the preceding claim, characterized in that the number of valves is less than or equal to two. 19. Véhicule selon l'une quelconque des revendications 17 ou 18, caractérisé en ce que la vanne (40) ou l'une au moins des vannes est une vanne à trois positions.19. Vehicle according to any one of claims 17 or 18, characterized in that the valve (40) or at least one of the valves is a three-position valve. 06.09.06 06.09.06
EP06808295A 2005-09-13 2006-09-07 Method for controlling a vehicle drive train comprising two cooling circuits Withdrawn EP1926625A1 (en)

Applications Claiming Priority (2)

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FR0509331A FR2890606B1 (en) 2005-09-13 2005-09-13 METHOD FOR CONTROLLING A MOTOR POWERTRAIN COMPRISING TWO COOLING CIRCUITS
PCT/FR2006/050857 WO2007031670A1 (en) 2005-09-13 2006-09-07 Method for controlling a vehicle drive train comprising two cooling circuits

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FR2890606A1 (en) 2007-03-16
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